fix(fragmentArguments): arguments on directives for nested fields (#4180)

fixes up just merged #4015

this was actually intended to be in #4015, but due to branch confusion
not originally included

now we also have a test!

Author: yaacovCR

src/execution/__tests__/variables-test.ts

@@ -1515,6 +1515,20 @@ describe('Execute: Handles inputs', () => {
       });
     });
 
+    it('when argument passed to a directive on a nested field', () => {
+      const result = executeQueryWithFragmentArguments(`
+        query {
+          ...a(value: true)
+        }
+        fragment a($value: Boolean!) on TestType {
+          nested { echo(input: "echo") @skip(if: $value) }
+        }
+      `);
+      expect(result).to.deep.equal({
+        data: { nested: {} },
+      });
+    });
+
     it('when a nullable argument to a directive with a field default is not provided and shadowed by an operation variable', () => {
       // this test uses the @defer directive and incremental delivery because the `if` argument for skip/include have no field defaults
       const document = parse(

src/execution/collectFields.ts

@@ -56,7 +56,6 @@ interface CollectFieldsContext {
   schema: GraphQLSchema;
   fragments: ObjMap<FragmentDetails>;
   variableValues: { [variable: string]: unknown };
-  fragmentVariableValues?: FragmentVariables;
   operation: OperationDefinitionNode;
   runtimeType: GraphQLObjectType;
   visitedFragmentNames: Set<string>;
@@ -135,14 +134,16 @@ export function collectSubfields(
   const newDeferUsages: Array<DeferUsage> = [];
 
   for (const fieldDetail of fieldGroup) {
-    const node = fieldDetail.node;
-    if (node.selectionSet) {
+    const selectionSet = fieldDetail.node.selectionSet;
+    if (selectionSet) {
+      const { deferUsage, fragmentVariables } = fieldDetail;
       collectFieldsImpl(
         context,
-        node.selectionSet,
+        selectionSet,
         subGroupedFieldSet,
         newDeferUsages,
-        fieldDetail.deferUsage,
+        deferUsage,
+        fragmentVariables,
       );
     }
   }